Results 1 to 4 of 4

Thread: Comparator to Ogive

  1. #1
    Join Date
    Jan 2006
    Location
    near sacramento
    Posts
    189

    Comparator to Ogive

    I have 2 bullet comparators. One 6mm and one 22cal. I thought I would mark my 6mm bulletts to see where insactly my 6mm comparator was reading the ogive on my bullets So I spun the bullett on the comparator and after looking at the groove on the bullet that the comparator made it seemed to me that the mark on the bullett was a bit low for checking the ogive. Using my caliper the groove on the bullett measured 2410. So I used a 22cal comparator and grooved the bullett with it and it measured 220 on the groove. Ok in your opinion where in the radius part of the ogive would be Considered most common to read ogive? From the pick below If you can see the marks on the bullet from the comparators what reading would you use, the bottom 6mm comp-or the top 22cal comp-? Both comparators are davidson comps
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	1D7D314E-D785-4080-8A42-EEBFDDAF4B08.jpeg 
Views:	268 
Size:	2.34 MB 
ID:	21993  
    Last edited by gabe ledesma; 02-07-2019 at 02:31 AM.

  2. #2
    Join Date
    Jan 2017
    Location
    Australia
    Posts
    52
    Now load a dummy round and see where the rifling touches the ogive buy the small square marks it will make. And see which is more correct, the 6mm or the 22

  3. #3
    Join Date
    Dec 2017
    Posts
    585
    it is a reference for setting the seating die and checking for wear.
    bbls vary
    so if you want a number for YOUR bbl, make a gauge from a section of YOUR bbl.

  4. #4
    Join Date
    Jan 2006
    Location
    near sacramento
    Posts
    189
    I know where my barrel lands touch the ogive on my bullets, itís just above the lower ogive line in the pick, What im thinking is that maybe my 6mm comparator is a bit oversized and is reading the ogive to far down and to close to the bearing surface of the bullet.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •